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Proton exchange membrane for medium-temperature fuel cell and preparation thereof

A proton exchange membrane, fuel cell technology, applied in fuel cells, fuel cell components, solid electrolyte fuel cells, etc., can solve the problem of reducing proton conductivity, improve operating temperature, increase mechanical properties and high temperature resistance Excellent performance and electrical conductivity

Inactive Publication Date: 2009-04-15
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Su Y.H. et al [J.Power Sources, 2006, 155(2): 111-117] prepared SPPEK / SiO 2 Composite film, nano-SiO 2 The particles are evenly distributed on the polymer matrix, which improves the swelling behavior, improves the thermal stability and mechanical properties, and the methanol penetration is improved to a certain extent, but the proton conductivity is reduced to a certain extent

Method used

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  • Proton exchange membrane for medium-temperature fuel cell and preparation thereof
  • Proton exchange membrane for medium-temperature fuel cell and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] [Example 1]: Preparation of sulfonated poly(ether sulfone ketone) (SPPESK)

[0042] Add 3g PPESK to the three-necked flask equipped with an electric stirrer, a reflux condenser, and a dropping funnel. Under heating in a water bath, stir and add dropwise a mixed solution of concentrated sulfuric acid and oleum (volume ratio of 1:1~ 1:2), dropwise within 10~30min, reflux and stir for 3~5h at 60℃~80℃, the reaction is complete, pour out the supernatant in the three-necked flask, and pour the brown viscous liquid at the bottom into Spinning in a mixture of ice and water to obtain white filaments, washed with water until neutral (pH about 7), and dried in a vacuum oven for 24 hours. Take out and pulverize, wash with water until the pH is about 7, filter with suction, put the filter cake in a vacuum drying oven to dry for 24 hours, and pulverize to obtain a white powder. Determine the degree of sulfonation.

Embodiment 2

[0043] [Example 2]: Sulfonated polynaphthalene polyether ketone (SPPEK), the preparation of sulfonated polynaphthalene polyether sulfone (SPPES) is the same as in Example 1, except that the raw material polynaphthyl polyether sulfone (PPESK) ) can be replaced by polynaphthalene polyether ketone (PPEK) and polynaphthalene polyether sulfone (PPES) respectively.

Embodiment 3

[0044] [Example 3]: The preparation of sulfonated polyetheretherketone (SPEEK) and sulfonated polyethersulfone (SPES) is the same as in Example 1, except that the raw material polyethersulfone (PPESK) is replaced by polyether ether For ketone (PEEK) and polyethersulfone (PES), just replace the sulfonating reagent with concentrated sulfuric acid.

[0045] The sulfonation of other materials is the same as embodiment 3.

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Abstract

The invention relates to a proton exchange membrane of fuel cells which can be used at medium temperature, which is a proton exchange membrane doped with sulfonated phenyl zirconium phosphonic acid. The proton exchange membrane is characterized in that the membrane preparing materials consist of sulfonated high molecular material and sulfonated phenyl zirconium phosphonic acid salts, wherein, the degree of sulfonation of sulfonated high molecular material selects 20 percent to 85 percent and accounts for 60 percent to 95 percent of the weight percentage of the membrane preparing material; and the degree of sulfonation of sulfonated phenyl zirconium phosphonic acid salts selects 30 percent to 90 percent accounts for 5 percent to 40 percent of the weight percentage of the membrane preparing material. Porous supporting materials can also be added into the membrane so as to improve strength of the membrane and reduce the deformability. The membrane preparing materials fill pores with the porous supporting materials and form a layer of membrane at the outer surface of the porous supporting materials. The invention is applicable to medium-temperature alcohol fuel cells so as to improve operating temperature of the fuel cells and improve the performance of the fuel cells.

Description

technical field [0001] The invention relates to a fuel cell proton exchange membrane doped with sulfonated phenylphosphonate and a preparation method thereof. Background technique [0002] At present, the key technical problems in the development of DMFC are the low catalyst activity and the alcohol permeation of the membrane. An effective way to solve the above two problems is to increase the operating temperature of the fuel cell. Therefore, the development and research of proton exchange membrane materials that can be used at medium temperature (120 ° C ~ 180 ° C) has become a hot spot in the development and research of DMFC today. Because, at this temperature, the catalyst, bipolar plate, sealing material and other materials of the battery can continue to be used, but the Nafion membrane material currently used can no longer be used. Therefore, the development and research of new proton exchange membrane materials that can be used under medium temperature conditions is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/10C08L81/06C08K5/5317C08J5/22H01M8/10H01M8/02H01M2/16H01M8/1023H01M8/1081H01M50/431
CPCY02E60/12Y02E60/522Y02E60/50
Inventor 李忠芳王素文徐丽娟董飞龙于先进
Owner SHANDONG UNIV OF TECH
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